On Tuesday, 3 September from 18.15 to 19.15 there will be a public evening tour. The ETH Zurich University Archives will be presenting its resources on the subject of "Kühle 4000˚C: Die Erforschung der Sonnenflecken an der ETH Zürich". The tour will be in German. Meeting point: ETH-Bibliothek, circulation desk (main building (external link), floor H). No registration necessary.